研究了随焊激冷减小铝合金薄板焊接变形的效果及夹具的散热条件对该效果的影响。研究表明,随焊激冷能够减小铝合金薄板的焊接变形,其效果受夹具自身冷却作用的影响很大。随着夹具散热条件的降低,随焊激冷所起的作用增强,但降低焊接变形的效果仍不够明显。适当预热夹具本身可以减小焊接变形,但更重要的是预热使激冷造成了温差拉伸,因此获得了最小的焊接变形。 The effect of welding chilling on the welding deformation of aluminum alloy sheet and the heat dissipation condition of the fixture on the effect were studied. The results show that with the welding chill can reduce the welding deformation of aluminum alloy sheet, the effect of cooling by the fixture itself a great influence. With the fixture cooling conditions reduce, with the role of chilled welding enhanced, but to reduce the effect of welding deformation is still not obvious enough. Appropriate preheating fixture itself can reduce the welding deformation, but more importantly, preheating the chilling caused by temperature difference stretching, thus obtaining the smallest welding deformation.